Hydrant.



J. EWART.

HYDRANT.

`APPLICATION FILED SEPT. 30, 1910.

.Patented Feb.'7, 1911.

1HE Normrs PErERs co.. WASH narrar sTArnslATENT onirica.

JOI-IN EWART, OF ARLINGTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO IVI.P. MCLA'UGHLIN, 0F WAKEFIELD, MASSACHUSETTS.

HYDRANT.

To all 'whom tt may concern.'

Be it known that I, JOI-IN EwART, of Arlington, in the county ofMiddlesex and State of Massachusetts, have invented certain new anduseful Improvements in I-Iydrants, of which the following is aspecification.

This invention relates to hydrants which are employed for drawing waterfrom water` pipes or mains at frequent intervals, the invention havingespecial reference to hydants such as are used in yards adjacent railwaystations for drawing water for car washing and other purposes.

The invention has for its object to provide a hydrant of simpleconstruction and free from liability to be rendered inoperative byfreezing of the water contained therein, and adapted to be removed fromthe water main without releasing water therefrom.

The invention consists in the improvements which I will now proceed todescribe and claim.

Of the accompanying drawings, forming a part of thisspecificatiom-Figure 1 represents a side view of a hydrant embodying myinvention engaged with a water-main. Fig. 2 represents a section on line2 2 of Fig. 1. Fig. 3 represents a section on line 3-3 of Fig. 2. Fig. 4represents a side view of a portion of the hydrant. Fig. 5 represents asection on line 55 of Fig. 2. Fig. 6 represents a section on line 6-6 ofFig. 2.

Similar reference characters indicate the same or similar parts in allthe iigures.

In the drawings, 12 represents a watermain which is or may be locatedunder ground and below the frost line, and is provided with an outletbranch 13, to which is rigidly connected a valve casing 14, having atone end an internal screw thread 15, adapted to detachably engage anexternally threaded nipple 16, on the lower end of the hydrant, thearrangement being such that the hydrant may be disconnected from themain and from the valve casing 14, by disengaging the nipple 16 from thethread 15. The valve casing 14 is provided with a check valve 17 adaptedto be closed by water pressure within the main to prevent the escape ofwater through the branch 13 when the hydrant is removed. Said checkvalve has a stem 18 which projects above the casing 14 and enters thelower part of the hydrant. When the hydrant is in place a portion of itSpeciiication of Letters Patent.

Application led September 30, 1910.

Patented Feb. v, 1911. Serial No. 584,647.

bears on the stem 18 and holds the valve 17 in a depressed positionagainst a guide or spider 19. The casing is provided with an internalflange 2O having a liquid passage 21 surrounding the stem 18 and locatedabove the check valve. The under side of the flange constitutes a valveseat against which the valve 17 is forced by water pressure within themain when the hydrant is removed, so that the removal of the hydrant forthe purpose of repairing the same, is accompanied by an automaticclosure of the passage through which water flows from the main into thehydrant. W

As here shown, the hydrant is composed of a sectionall casing rigidlysecured to the valve casing 14, and a conduit which is rotatable andmovable endwise in `said casing, the conduit extending from the upperend of the casing, and terminating in a downwardly directed nozzle 22.

The casing is preferably composed of a lower section 23 on which thenipple 16 is formed, an upper section 24 connected by an internallythreaded sleeve 25 with the lower section .23, said sections 23 and 24having external screw threads which engage the internal threads in thesleeve 25, as shown by Fig. 2, and an internally threaded cap 26 engagedwith an external thread on the upper end portion of the upper section24.

The rotatable and longitudinally movable conduit is preferably composedof a lower section 29 having at its lower end a valve 27 adapted to bearon a seat 23 formed on the lower casing section and thus close thehydrant, an upper section 29a which projects through the cap 26 and isconnected as shown by Fig. 1 to the outlet nozzle 22, and anintermediate section 30 connected at one end with the conduit section 29by a sleeve 31, and engaged at its lower end with an internally threadedsocket 32 formed on the outer end of the lower section 29.

The cap 26 is provided with cams 33 which are formed to constitutetracks for rolls 34 journaled in bearings on a collar 35 which isaiiixed by a set screw 36al to the conduit section 29a. The form of thecams 33 is such that when the conduit portion is turned to the positionshown by Figs. 2, 3, and 4, it is pressed downwardly by a spring 36interposed between the cap 26 and an enlargement 37 on the conduitportion, said enlargement being preferably a washer seated on the upperend of the coupling sleeve 31. The spring 36 holds the valve 27 on itsseat 28, thus closing` the hydrant. Then the conduit portion of thehydrant is given a partial rotation from the position shown by Figs. 2,3, and et, the rolls 311 and the conduit portion of the hydrant areraised by the cams 83 againstthe pressue 'of the `spring 36, the valve27 being thus raised Jfrom its seat so that liquid flows through thehydrant, the

lower conduit section being provided with passages 38 immediately abovethe valve 27.

It will be seen thereforethat in order to cause the discharge of fromthe hydrant, it is only neces'sai jto partially turn the conduitportion, thV

v'outlet nozzle 22 and the tubing connecting the same with the conduitsection 29a constituting a handle or lever by which this operation maybe effected. wWhen it is desired to close the hydrant the conduitportion is turned in the opposite direction until the spring 36 closesthe valve '27.

The casing is provided with a suitable stuliing box 39 which preventsleakage of water around the exterior of the conduit section 29.

40 represents a shield or cover having a hub 41 which is attached by aset screw Ll2 to the conduit section 29, said shield `projectingdownwardly and surrounding the cams 33 and collar 35.Y

The hydrant may be removed from themain, when this is required for anypurpose, by unserewing the nipple or coupling member 16 from thecomplemental coupling member or internal screw thread 15. YVhen this isdone the check valve 17 is closed by liquid pressure in the main, sothat there is no leakage of water from the main while the hydrant isremoved. The act of replacing the hydrant causes the valve 27 todisplace the stem 18 and check valve 17, the latter being thus opened.

The rollers 341 constituterunners movable upon the cams 33, it beingobvious that these runners may be non-rotary if desired.

The main 12 and its outlet, including the check valve casing 1&1, areusually located under ground and below the frost line. The advantage or'the check valve, adapted to be automatically closed when the hydrant isremovedand opened by the installation of the hydrant, will therefore bereadily seen.

I claim 1. A hydrant comprising a tubular casing adapted for attachmentto a water-main, and having an internal valve seat, a tubular conduitrotatable and movable endwise in said easing and provided with a valveadapted to close on said seat, a spring adapted to move the conduit inone direction to close the valve, cams supported by the casing andrunners connected with the conduit and pressed by the spring againstsaid cams, the cams and runners causing an endwise movement of theconduit to open the valve when the conduit is rotated in the casing.

2. A water-main having a valve casing constituting an outlet andprovided with a coupling member and an internal valve seat, and a checkvalve movable against said seat by water pressure in the main andprovided with a stem projecting above said coupling member, combinedwith a hydrant comprising a casing having a complemental coupling memberadapted to detachably engage the coupling member on the check valvecasing, and to receive the outer end of said valve stem, said hydrantcasing having also an internal valve seat, a conduit rotatable andmovable endwise in the hydrant casing, said conduit having a valveadapted to simultaneously close on the hydrant valve seatv and engagethe check valve stem to open the check valve, and means for moving theconduit endwise to open and close the hydrant valve.

In testimony whereof I have afi'lxed my signature, in presence of twowitnesses.

JOHN EVVAl/l. lVitnesses C. F. BROWN, H. L. ALLEN.

